<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .block {
            float: left;
            margin-left: 30px;
        }

        .content {
            height: 100px;
            width: 200px;
            border: solid 1px blueviolet;

        }
    </style>
</head>
<body>
<h3>点击复制可以复制textarea中的内容，任何textarea下点击粘贴按钮，可以将复制的内容粘贴到该textarea中</h3>

<hr/>

<div class="block">
    内容：<br/>
    <textarea class="content"></textarea>
    <br/>
    <input type="button" value="复制" class="copy"/>
    <input type="button" value="粘贴" class="paste"/>
</div>
<div class="block">
    内容：<br/>
    <textarea class="content"></textarea>
    <br/>
    <input type="button" value="复制" class="copy"/>
    <input type="button" value="粘贴" class="paste"/>
</div>
<div class="block">
    内容：<br/>
    <textarea class="content"></textarea>
    <br/>
    <input type="button" value="复制" class="copy"/>
    <input type="button" value="粘贴" class="paste"/>
</div>
<div class="block">
    内容：<br/>
    <textarea class="content"></textarea>
    <br/>
    <input type="button" value="复制" class="copy"/>
    <input type="button" value="粘贴" class="paste"/>
</div>
</body>
</html>